Art Deco is strongly light-biased - shadow is suggested rather than declared. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The saturated accent, #A06752, registers at 3.4% - sparse enough to feel like a deliberate surprise. Spanning 53 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky.